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1

Application of diffusion model for adsorption of azo reactive dye on pumice

100%
Veliev E. V., Ozturk T., Veli S., Fatullayev A. G.
Polish Journal of Environmental Studies
|
2006
|
tom 15
|
nr 2
In this work, adsorption of reactive azo dye on pumice has been studied by using batch techniques. The influence of agitation, initial dye concentration, and adsorbent mass has been studied. The equilibrium adsorption capacity of pumice for dye was obtained by using linear Freundlich isotherm. It was found that pumice could be an appropriate adsorbent in removal of dye from wastewater. In order to explain the adsorption mechanism, a diffusion model was applied, and calculations were made for solid diffusivity, (Ds) and external mass-transfer coefficient (kf). The applied diffusion model showed that kf was constant for all initial dye concentrations (co), and Ds increased as co did. Furthermore, Ds was found to decrease with increasing adsorbent mass.
2

Chemically enhanced primary treatment of textile industrial effluents

86%
Mahmoud E. K.
Polish Journal of Environmental Studies
|
2009
|
tom 18
|
nr 4
651-655
Textile industries consume substantial volumes of water and chemicals for wet processing of textiles. Effluent discharge from textile industries to neighbouring water bodies and wastewater treatment systems is currently causing significant health concerns. Chemically enhanced primary treatment (CEPT) involves the use of chemical coagulants to enhance the coagulation or flocculation of wastewater particles. The chemicals of aluminum sulphate (alum), ferric chloride (FeCl₃) and cationic polymer were studied by jar test to select the most suitable coagulant for effective treatment of textile industrial effluents. The results showed that the optimum dosage for the removal of 75% of colour, 64% turbidity and 69% of chemical oxygen demand (COD) was 300 ppm of alum after pH adjustment at pH = 7.2. An experiment further revealed that the addition of 300 mg l⁻¹ of alum and 1 mg l⁻¹ of polymer could provide a reduction of colour, turbidity, COD and phosphorous higher than 95%, 75%, 76% and 90%, respectively. The experimental results confirmed that CEPT can be adopted as a decolorization of textile industrial effluents. Moreover, it can improve sludge setting and dehydration properties, and decrease the treatment cost.
3
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Plasma in textile industry - technology for XXI century?

86%
Rakowski W.
Acta Agrophysica
|
2002
|
tom 80
4

Removal of direct dyes from aqueous solution using various adsorbents

86%
Yavuz O., Aydin A. H.
Polish Journal of Environmental Studies
|
2006
|
tom 15
|
nr 1
Dyestuff production units and dyeing units have always had a pressing need for techniques that allow economical pre-treatment for colour in the effluent. The effectiveness of adsorption for dye removal from wastewaters has made it an ideal alternative to other expensive treatment options. Removal of direct dyes [direct yellow 50 (DY50), direct red 80 (DR80) and direct blue 71(DB71)] from an aqueous solution by different adsorbents such as activated carbon, raw kaolinite and montmorillonite was investigated. The adsorption isotherm data were fitted to the Langmuir isotherm. Parameters of the Langmuir isotherm have been determined using the adsorption data. Adsorption capacity of RAC (commercial activated carbon), HAC (activated carbon obtained from shell of hazelnut), KC ( raw kaolinite) and MC (montmorillonite) increased in the following order: DY50 > DR80 > DB71, DB71>DR80>DY50, DR80>DB71>DY50 and DB71>DR80 (DY50 showed no absorption) for the direct dyes, respectively.
5

Effects of pH and coagulant dosage on effectiveness of coagulation of reactive dyes from model wastewater by polyaluminium chloride [PAC]

86%
Klimiuk E., Filipkowska U., Korzeniowska A.
Polish Journal of Environmental Studies
|
1999
|
tom 08
|
nr 2
6

The adsorption of reactive dyes from mixtures containing surfactants onto chitin

86%
Klimiuk E., Kabardo K., Gusiatin Z., Filipkowska U.
Polish Journal of Environmental Studies
|
2005
|
tom 14
|
nr 6
Adsorption of reactive dyes and surfactants onto chitin from mixtures containing surfactants at constant concentration and dyes at variable concentration was investigated in the present study. Two vinylsulfonate dyes (Scarlet R, Brillantorange 3R); chlorotriazine dye (Black DN); anionic (Borutosol KRN, Siarczanol N-2) and non-ionic (Rokafenol N-8) surfactants were tested. The experiments were carried out without and with pH adjustment. The research have proved that at pH 6.2 and in surfactants presence the adsorption of vinyl-sulfonate dyes onto chitin was lower than without surfactants (control sample). It was observed that the maximum adsorption capacity of chitin in mixtures of Scarlet R and surfactants was about 3-fold lower than without surfactants and in mixtures of Brillantorange 3R and surfactants was from 2.5 to 4.1-fold lower than in control sample. At pH 3.0 the differences between maximum adsorption capacity of chitin for dyes from aqueous solutions and containing surfactants ranged from 2% (in mixture of Brillantorange 3R and Borutosol KRN) to 23% (in mixture of Scarlet R and Siarczanol N-2). The maximum adsorption capacity of chitin for Black DN (chlorotriazyne dye) in surfactants presence (from 140 to 290 mg/dm3 ) was higher at pH 6.2 as well as at pH 3.0 in comparison to control sample. Rokafenol N-8 was adsorbed the weakest onto chitin from among tested surfactants. At pH 3.0 for vinyl-sulfonate dyes the relationships between mass proportion of dye and surfactant adsorbed onto chitin (Qdye/QSAA* ) and initial concentration proportion of dye and surfactant in solution (Cdye/CSAA) was nearly linear. This indicates that dyes competed with surfactants of active sites of chitin. SAA* – Surface Active Agent (s)
7
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Optimization of culture conditions for improved green biodecolorization of methylene blue by Rhodococcus pyridinivorans strain UCC 0003

72%
Maniyam M. N., Hari M.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
|
2021
|
tom 102
|
nr 2
8
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Mycoremediation of anthraquinone dyes from textile industries: a mini-review

72%
Sen S. K., Raut S., Raut S.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
|
2023
|
tom 104
|
nr 1
9

Biotechnology development in cotton fiber: strategies, applications, and socio-economic impact

72%
Sawahel W.
Cellular and Molecular Biology Letters
|
1997
|
tom 02
|
nr 3
Classical breeding provides the means for transferring genes among compatible cotton cultivars, and thereby narrows the number of fibers traits that can be enhanced. On the other hand, recombinant DNA technology provides ways to transfer genes from any living organism into cotton, and therefore opens the door for improving existing fiber quality as well as producing fibers with new and novel properties. As new generations of cotton fibers are developed through genetic engineering, they will impact on the textile industry which is a significant segment of economies of many countries. This article focuses on the recent advances in cotton fiber biotechnology and its impact. The genetic strategies for producing speciality fibers, such as wrinkle-free polyster fibers, coloured fibers and fibers with immobilized enzymes, are examined. In addition, an outline about fiber modification genes, such as hormone and cellulose genes, is provided. Finally, the socio-economic impact of such development on the cotton industry in developing countries is discussed.
10

The modified Fenton process for decolorization of dye wastewater

72%
Barbusinski K.
Polish Journal of Environmental Studies
|
2005
|
tom 14
|
nr 3
A novel modified Fenton process using heterogeneous catalyst (swarf) was developed to catalyze the oxidation reaction of azo dye Acid Red 18. It was found that swarf could be used to replace iron salts as a catalyst for the Fenton reaction. The examined continuous Fenton process proved to be very efficient for decolorization of simulated wastewater containing 100 mg/dm³ Acid Red 18. Performance of the Fenton reactor and regeneration method of the catalyst was discussed. The simplified mechanism of hydroxyl radical production in the presence of swarf as a catalyst also was proposed.
11
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Comparison of growth and enzymatic activity of mycelium and yielding of Pleurotus ostreatus (Fr.) Kumm. on different substrates

58%
Siwulski M., Drzewiecka K., Sobieralski K., Chong Y.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2010
|
tom 09
|
nr 3
Cereal straw is used as the most common substrate for Pleurotus ostreatus (Fr.) Kumm. cultivation. However other easily available and cheep materials are being sought. Textile industry wastes, among others, seem to be suitable materials. The effect of the kind of substrate on the mycelium growth, enzymatic activity and yield of Pleurotus ostreatus (Fr.) Kumm. was investigated. The subjects of the studies were the ‘K22’ and ‘P80’ strains of P. ostreatus and four substrates: i.e. alder sawdust, rye straw, hemp and flax shive. The type of substrate was found to affect the examined P. ostreatus parameters. The examined strains responded similarly to the applied substrate type. The best mycelium growth was obtained on the substrate from flax shive. The activity of the laccase enzyme turned out to be the highest on the hemp shive and the same substrate also yielded the highest crop of carpophores. The obtained results corroborated high usefulness of hemp and flax shive for the cultivation of P. ostreatus.
12

Mycelium growth and yield of wild strains of Pleurotus ostreatus (Jacq.: Fr.) Quel. cultivated on waste materials from the textile industry

58%
Sobieralski K., Siwulski M., Sas-Golak I., Mankowski J., Kotlinska T.
Folia Horticulturae
|
2011
|
tom 23
|
nr 1
13

Applicability of liquid membranes in environmental protection

58%
Kaminski W., Kwapinski W.
Polish Journal of Environmental Studies
|
2000
|
tom 09
|
nr 1
One of the modern techniques of mixture separation is the application of liquid membranes. They reveal the ability of selective transport of mixture components in which a liquid membrane constitutes a separate phase which separates two other liquid or gas phases. This property of membranes makes them useful in the textile and food industries, in hydrometallurgy, medicine, biotechnology, environmental protection, in the separation of hydrocarbons and gases, and in the concentration and separation of amino acids, metal ions and other mixtures and suspensions.
14

The effect of pH and chitin preparation on adsorption of reactive dyes

58%
Klimiuk E., Filipkowska U., Wojtasz-Pajak A.
Polish Journal of Environmental Studies
|
2003
|
tom 12
|
nr 5
The effect of chitin preparation with HCl (chitin A) and with HCl and KOH (chitin B) and pH on the adsorption of reactive dyes (helactine, polactine and remazol) on chitin was investigated. The double Lang- muir equation was appropriate to analyze the dependence between amount of the adsorbed dye on chitin (Q) and its equilibrium concentration (C). It indicated the presence of two types of active sites which differed in both the maximum adsorption capacity (b) and adsorption affinity (K). Based on the dimensionless separa­tion factor R it was found that the dye adsorption mechanism in type I sites was an ion exchange, whereas in the case of type II sites it was a physical adsorption. The adsorption capacity of the chitin A (deacetylation degree of 3%) for samples without pH adjustment ranged from 29 (Red D-8B) to 67 mg/g dry weight of chitin (Gelb GR). At pH 3.0 the adsorption capacity was higher from 1.9 to 2.3-fold. The most favourable effect of pH change was found for helactine dyes. The adsorption capacity of the chitin B (deacetylation degree of 5%) was from 66 (Brillantorange 3R) to 101 mg/g dry weight of chitin (Gelb GR). After pH adjustment to pH 3.0 the adsorption capacity ranged from 160 (Ruby F-2B) to 294 mg/g dry weight of chitin (Blau 3R). The most favourable effect of deacety- lation degree increase was found in the case of helactine dyes in the samples without pH adjustment, and polactine and remazol dyes at pH 3.0.
15

Adsorption of reactive dyes by modified chitin from aqueous solutions

58%
Filipkowska U., Klimiuk E., Grabowski S., Siedlecka E.
Polish Journal of Environmental Studies
|
2002
|
tom 11
|
nr 4
The adsorption of reactive dyes onto chitin (deacetylation degree = 5%) was investigated from aqueous solutions at pH 3. Ten reactive dyes were examined, including 5 dyes from the helactine group, 3 dyes from the polactine group and 2 dyes from the remazol group. The K and b constants were calculated from the Langmuir equation that assumes the presence of two sites of different nature. It was found that the dye adsorption on chitin in type I and II sites differed in both the adsorption affinity and maximum adsorption capacity. Based on the dimensionless separation factor RL it was found that the dye adsorption mechanism in type I sites was an ion exchange, whereas in the case of type II sites it was a physical adsorption. A correlation was found between dye adsorption on chitin and the number of sulfone groups in a dye molecule. However, neither molecular weight nor the number of aromatic rings was correlated with dye adsorption.
16

Jan Sobocki

58%
Staniszkis O.
Biuletyn Informacyjny Izby Wełny
|
1992
|
nr 85
3-4
17

Zagadnienia zwiekszania wyrobow

51%
Bogacka A.
Biuletyn Informacyjny Izby Wełny
|
1992
|
nr 85
14-17
18
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Comparison of mycelium growth of selected species of cultivated mushrooms on textile industry wastes

51%
Siwulski M., Sobieralski K., Mankowski J.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2010
|
tom 09
|
nr 3
Mushrooms are cultivated on a wide range of materials of organic origin. Textile industry wastes seem to be interesting in this regard. In experiment, mycelium growth of the following eight mushroom species: Pholiota nameko (Ito) Ito et Imai, Flammulina velutipes (Curt. ex Fr.) Sing., Lyophyllum ulmarium (Bull. ex Fr.) Kumm., Marasmius oreades (Bolt.: Fr.) Fr., Hericium erinaceus (Bull: Fr.) Pers., Agrocybe aegerita (Brig.) Sing., Lentinula edodes (Berk.) Pegl. and Ganoderma lucidum (Curt: Fr.) Karst. cultivated on alder sawdust, rye straw, hemp and flax shive substrates was investigated. Significant variability in mycelium growth was observed depending on the mushroom species and the type of the applied substrate. The best mycelium growth of the examined mushroom species was recorded on flax shive and alder sawdust. In the majority of the experimental mushroom species, the worst growth of mycelia was recorded on the hemp shive substrate.
19

Nowe techniki i technologie w wykonczalnictwie

51%
Czubaj C.
Biuletyn Informacyjny Izby Wełny
|
1992
|
nr 85
4-11
20

Genetic manipulation of flax

51%
Lorenc-Kukula K., Wrobel-Kwiatkowska M., Skala J., Szopa J.
Biological Letters
|
2005
|
tom 42
|
nr 2 Spec.Vol.
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